arch/i386/include/klibc/archsys.h

/*
 * arch/i386/include/klibc/archsys.h
 *
 * Architecture-specific syscall definitions
 */

#ifndef _KLIBC_ARCHSYS_H
#define _KLIBC_ARCHSYS_H

/*
 * If we're compiling i386 in PIC mode, we need to treat %ebx
 * specially.  Most of these are copied from the equivalent file in
 * newlib and were written by Werner Almesberger.
 */
#if defined(__PIC__)

/* _syscall0() is the same as non-PIC */

#undef _syscall1
#define _syscall1(type,name,type1,arg1) \
type name(type1 arg1) \
{ \
long __res; \
__asm__ __volatile__ ("push %%ebx; movl %2,%%ebx; int $0x80; pop %%ebx" \
	: "=a" (__res) \
	: "0" (__NR_##name),"r" ((long)(arg1))); \
__syscall_return(type,__res); \
}

#undef _syscall2
#define _syscall2(type,name,type1,arg1,type2,arg2) \
type name(type1 arg1,type2 arg2) \
{ \
long __res; \
__asm__ __volatile__ ("push %%ebx; movl %2,%%ebx; int $0x80; pop %%ebx" \
	: "=a" (__res) \
	: "0" (__NR_##name),"r" ((long)(arg1)),"c" ((long)(arg2))); \
__syscall_return(type,__res); \
}

#undef _syscall3
#define _syscall3(type,name,type1,arg1,type2,arg2,type3,arg3) \
type name(type1 arg1,type2 arg2,type3 arg3) \
{ \
long __res; \
__asm__ __volatile__ ("push %%ebx; movl %2,%%ebx; int $0x80; pop %%ebx" \
	: "=a" (__res) \
	: "0" (__NR_##name),"r" ((long)(arg1)),"c" ((long)(arg2)), \
		"d" ((long)(arg3))); \
__syscall_return(type,__res); \
}

#undef _syscall4
#define _syscall4(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4) \
type name (type1 arg1, type2 arg2, type3 arg3, type4 arg4) \
{ \
long __res; \
__asm__ __volatile__ ("push %%ebx; movl %2,%%ebx; int $0x80; pop %%ebx" \
	: "=a" (__res) \
	: "0" (__NR_##name),"r" ((long)(arg1)),"c" ((long)(arg2)), \
	  "d" ((long)(arg3)),"S" ((long)(arg4))); \
__syscall_return(type,__res); \
}

#undef _syscall5
#define _syscall5(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4, \
          type5,arg5) \
type name (type1 arg1,type2 arg2,type3 arg3,type4 arg4,type5 arg5) \
{ \
long __res; \
__asm__ __volatile__ ("push %%ebx; movl %2,%%ebx; int $0x80; pop %%ebx" \
	: "=a" (__res) \
	: "0" (__NR_##name),"m" ((long)(arg1)),"c" ((long)(arg2)), \
	  "d" ((long)(arg3)),"S" ((long)(arg4)),"D" ((long)(arg5))); \
__syscall_return(type,__res); \
}

#undef _syscall6
#define _syscall6(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4, \
          type5,arg5,type6,arg6) \
type name (type1 arg1,type2 arg2,type3 arg3,type4 arg4,type5 arg5,type6 arg6) \
{ \
long __res; \
__asm__ __volatile__ ("push %%ebx; pushl %%ebp; movl %2,%%ebx; " \
                      "movl %%eax,%%ebp; movl %1,%%eax; int $0x80; " \
                      "pop %%ebp ; pop %%ebx" \
	: "=a" (__res) \
	: "i" (__NR_##name),"m" ((long)(arg1)),"c" ((long)(arg2)), \
	  "d" ((long)(arg3)),"S" ((long)(arg4)),"D" ((long)(arg5)), \
	  "a" ((long)(arg6))); \
__syscall_return(type,__res); \
}

#endif /* __PIC__ */

#endif /* _KLIBC_ARCHSYS_H */